Helen of Cleves (1423-1471) (1423–1471) Parents Marie of Burgundy Adolph I Children Margarethe von Braunschweig-Wolfenbüttel Siblings Catherine of Cleves Agnes of Cleves Adolph of Cleves, Lord of Ravenstein Margaret of Cleves, Duchess of Bavaria-Munich Elisabeth of Cleves, Countess of Schwarzburg-Blankenburg Maria of Cleves John I, Duke of Cleves Anna von der Mark-Kleve Engelbert von der Mark-Kleve Partners Henry the Peaceful, Duke of Brunswick-Lüneburg